2m aprs antenna

Discussion in 'General Technical Questions and Answers' started by NS0Y, Nov 1, 2009.

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  1. NS0Y

    NS0Y Ham Member

    Im looking for an small antenna (unity gain?) for aprs use only. Im open for any suggestions, glass, nmo, mag, any mount out there. But dont want another long antenna hanging off the car. Its starting to look like a porcupine already.

    Radio's that will be in the car are:
    Alinco 135T
    Yaesu 7800
     
    Last edited: Nov 1, 2009
  2. KB4QAA

    KB4QAA XML Subscriber

    Well, a quarter wave antenna is about unity gain. That's about 19 or 19.5 inches. A glass mount antenna will give you the worst performance. Anyplace else is a plus.

    glassmount, drill a hole or magmount. Those are you choices.

    a.m.
     
  3. NE3R

    NE3R Ham Member

    Any old 1/4 wave will do. You'll want good seperation from your other antenna if you generally operate on two meters. Even then it is hard to keep one from desensing the other. That is why I switched to the Kenwood TM-D700 - no more interfering with myself.

    73 de Joseph Durnal NE3R
     
  4. N8WCT

    N8WCT Ham Member

    You should consider your normal driving routes, and determine whether you can hit a digi, or an iGate...depending what you are trying to accomplish with APRS.

    Normally, of course, within a large city (assuming there are high-profile digis/iGates around) you could probably get by with 5 watts, with on of those small 1/4 wave rare-earth mag mounts.

    But if youre in the boonies, you may need more power/antenna to get the job done.

    73.

    -Chris
     
  5. KC9AXZ

    KC9AXZ Ham Member

    Larsen make a nice short dual band antenna. I don't recall the model number though. It's well built and spring loaded. I bought one a few years back for garage clearance. I use it probably about 90% of the time. I only switch to a higher gain antenna for road trips.

    Jon KC9AXZ
     
  6. K0RGR

    K0RGR Premium Subscriber

    You may want to consider selling the rigs you have and looking for a Kenwood TMD700 or D710. That way, you will only need one antenna for APRS, and the muting of the second receiver is handled for you in advance.

    To some extent, your antenna will affect your performance. If you're close to an iGate most of the time, it probably isn't critical at all. If you're operating on the fringes, you may want something bigger.
     
  7. KA7O

    KA7O Ham Member

    Check this out.

    [​IMG]

    Low profile - almost a 'shark fin' type. MSRP $72.00. Does normally require a drilled hole, but they do offer an adapter to use with a 'mini-mag' mount.

    note: MSRP is what is listed, but if you poke around, you should be able to get it for less.
     
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